diff --git a/modules/banned-regexps.pl b/modules/banned-regexps.pl
new file mode 100644
index 00000000..cbbaf4d6
--- /dev/null
+++ b/modules/banned-regexps.pl
@@ -0,0 +1,83 @@
+# Copyright (C) 2012  Alex Schroeder <alex@gnu.org>
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 3 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program. If not, see <http://www.gnu.org/licenses/>.
+
+$ModulesDescription .= '<p><a href="http://git.savannah.gnu.org/cgit/oddmuse.git/tree/modules/banned-regexps.pl">banned-regexps.pl</a>, see <a href="http://www.oddmuse.org/cgi-bin/oddmuse/Banning_Regular_Expressions">Banning Regular Expressions</a></p>';
+
+=h1 Compatibility
+
+This exension works with logbannedcontent.pl.
+
+=h1 Example content for the BannedRegexps page:
+
+    # This page lists regular expressions that prevent the saving of a page.
+    # The regexps are matched against any page or comment submitted.
+    # The format is simple: # comments to the end of the line. Empty lines are ignored.
+    # Everything else is a regular expression. If the regular expression is followed by
+    # a comment, this is used as the explanation when a user is denied editing. If the
+    # comment starts with a date, this date is not included in the explanation.
+    # The date could help us decide which regular expressions to delete in the future.
+    # In other words:
+    # ^\s*([^#]+?)\s*(#\s*(\d\d\d\d-\d\d-\d\d\s*)?(.*))?$
+    # Group 1 is the regular expression to use.
+    # Group 4 is the explanation to use.
+
+    порно # 2012-12-31 Russian porn
+    <a\s+href=["']?http # 2012-12-31 HTML anchor tags usually mean spam
+    \[url= # 2012-12-31 bbCode links usually mean spam
+    \s+https?:\S+[ .\r\n]*$ # 2012-12-31 ending with a link usually means spam
+    (?s)\s+https?:\S+.*\s+https?:\S+.*\s+https?:\S+.* # 2012-12-31 three naked links usually mean spam
+
+=cut
+
+use vars qw($BannedRegexps);
+
+$BannedRegexps = 'BannedRegexps';
+
+push(@MyInitVariables, sub {
+       $AdminPages{$BannedRegexps} = 1;
+       $LockOnCreation{$BannedRegexps} = 1;
+       $PlainTextPages{$BannedRegexps} = 1;
+       # take the opportunity to clean out some stuff
+       delete $AdminPages{$RssInterwikiTranslate};
+       delete $AdminPages{$StyleSheetPage};
+     });
+
+*RegexpOldBannedContent = *BannedContent;
+*BannedContent = *RegexpNewBannedContent;
+
+# the above also changes the mapping for the variable!
+$BannedContent = $RegexpOldBannedContent;
+
+sub RegexpNewBannedContent {
+  my $str = shift;
+  my $rule = RegexpOldBannedContent($str, @_);
+  if (not $rule) {
+    foreach (split(/\n/, GetPageContent($BannedRegexps))) {
+      next unless m/^\s*([^#]+?)\s*(#\s*(\d\d\d\d-\d\d-\d\d\s*)?(.*))?$/;
+      my ($regexp, $comment, $re) = ($1, $4, undef);
+      eval { $re = qr/$regexp/i; };
+      if (defined($re) && $str =~ $re) {
+        $rule = Tss('Rule "%1" matched on this page.', QuoteHtml($regexp)) . ' '
+          . ($comment ? Ts('Reason: %s.', $comment) : T('Reason unknown.')) . ' '
+            . Ts('See %s for more information.', GetPageLink($BannedRegexps));
+        last;
+      }
+    }
+  }
+  if ($rule and $BannedFile) {
+    LogBannedContent($rule);
+    return $rule;
+  }
+  return 0;
+}